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Betfair API Release - betDelayModels to listMarketCatalogue response -12thJanuary2026
From 12th January 2026, a new betDelayModels field will be added to the listMarketCatalogue response. This change will be released at the same time as the previously announced marketFilter release.
The betDelayModels field will be returned if the listMarketCatalogue request includes MARKET_DESCRIPTION in the marketProjection field and the market/s returned have bet delay models enabled.
Please note that if the market does not have bet delay models, then betDelayModels will not show up at all in the response, like the second market 1.184109216 in the example below.
Example for listMarketCatalogue.
Betfair Developer Program
The betDelayModels field will be returned if the listMarketCatalogue request includes MARKET_DESCRIPTION in the marketProjection field and the market/s returned have bet delay models enabled.
Please note that if the market does not have bet delay models, then betDelayModels will not show up at all in the response, like the second market 1.184109216 in the example below.
Example for listMarketCatalogue.
Code:
"jsonrpc": "2.0",
"result": [
{
"marketId": "1.179675904",
"marketName": "Match Odds",
"description": {
"persistenceEnabled": true,
"bspMarket": false,
"marketTime": "2025-06-25T14:59:32.000Z",
"suspendTime": "2027-10-27T14:59:32.000Z",
"bettingType": "ODDS",
"turnInPlayEnabled": true,
"marketType": "MATCH_ODDS",
"regulator": "MALTA LOTTERIES AND GAMBLING AUTHORITY",
"marketBaseRate": 6.0,
"discountAllowed": false,
"wallet": "UK wallet",
"rulesHasDate": false,
"priceLadderDescription": {
"type": "CLASSIC"
},
"betDelayModels": [
"PASSIVE",
"DYNAMIC"
]
},
"totalMatched": 993.75
},
{
"marketId": "1.184109216",
"marketName": "R10 1200m Hcap",
"description": {
"persistenceEnabled": true,
"bspMarket": true,
"bettingType": "ODDS",
"turnInPlayEnabled": true,
"marketType": "WIN",
"regulator": "MALTA LOTTERIES AND GAMBLING AUTHORITY",
"marketBaseRate": 6.0,
"discountAllowed": false,
"wallet": "UK wallet",
"rulesHasDate": false,
"priceLadderDescription": {
"type": "CLASSIC"
}
},
"totalMatched": 0.0
}
],
"id": 1
}